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Pharmacokinetic approach for optimizing gentamicin use in neonates during the first week of life

Ahmed S Ali1, M Fadulallah Farouq, Khalid A Al-Faify

  • 1Department of Pharmacology, King Abdulaziz University, Jeddah, Kingdom of Saudi Arabia. Ahmedshaker21@yahoo.com

Indian Journal of Pharmacology
|February 21, 2012
PubMed

Insights

Optimizing gentamicin use in neonates is crucial for treating sepsis. A dose of 4.5 mg/kg every 36 hours is recommended for most newborns, with adjustments for extremely low birth weight infants.

Area of Science:

  • Neonatal pharmacology
  • Pediatric infectious diseases
  • Clinical pharmacokinetics

Background:

  • Gentamicin is a critical antibiotic for treating neonatal sepsis.
  • Optimizing gentamicin dosing in the first week of life is essential for efficacy and safety.

Purpose of the Study:

  • To optimize gentamicin dosage and interval for neonates during their first week of life.
  • To evaluate the pharmacokinetic parameters of gentamicin in a neonatal population.

Main Methods:

  • Seventy-three neonates receiving gentamicin (4-5 mg/kg, 24-48 hr interval) were studied.
  • Peak and trough serum levels were measured; pharmacokinetic parameters were estimated.
  • Statistical analysis used ANOVA with SPSS Version 13.

Main Results:

  • 73% achieved therapeutic peak gentamicin levels (6-12 μg/ml).
  • 12% had potentially toxic trough levels (>2 μg/ml), more frequent with 24 hr dosing.
  • Higher volume of distribution observed in neonates with sepsis; longer half-life in extremely low birth weight infants.

Conclusions:

  • A gentamicin dose of 4.5 mg/kg every 36 hours is recommended for neonates with normal or low birth weight.
  • An every 48-hour interval is suggested for extremely low birth weight neonates.
Abstract

Keywords:
Gentamicinpharmacokineticspreterm neonatestherapeutic drug monitoring

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